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TO ALL' WHOMIT MAY- CONCERN: y

Be it known that I, W. G. HYNDMAN, of Cincinnati, in the county of Hamilton, and State of Ohio, have A*invented an Improved Brick'a-nd Tile Machine; and I do hereby declare thatthe following is` a full and -exact Vdescription thereof, reference beinghad to the accompanying drawings, niaking'part of this specification- I Figurel being a plan of the machine. v 'l Figure 2 a side elevation thereof. Figure 3 o; horizontal section ofthe saine in a plane indicated by the line :I: x, tig.` l Figure 4 a-side view of my improved wiper on the pug-mill shaft. Figure 5 an' end view of one of the die rollers.` Figure 6 a view looking upward froma. plane indicated by the line y y, iig. 2. VLike letters designatecorresponding parts in all'of the gures.

improved machine isIof the kind in which'the clay ist'orced from the mill through adie, in a. continu- -ous'web of the desired width and'thicknesmthebricks beingthen cut therefrom by some suitable devicef In mymacbine I employ twoV outlets4 aindpdies, say on oppositel sides ot" the mill, through which the clay of af certain quantity is forced alternately, so that each v veb is driven out and. formedto the-desired extent, and then remains stationary `Irhile the other web is forming, and the bricks are cut, o'if ivhile the web is not in motion. This enables me to use a. very simple` means of cutting oi the bricks or tiles, consisting merely of wires Astretched in a frame, which isswungacross the web. I claim nothing new in the cutting-ofi` apparatus, and therefore do not represent it. I i y v. v

Invthe accompanying drawings, let A represent a pug-mill, situated on a suitable base, B, and C the driving- `shaft, lon. which tempering-arms E E `are located. The two die outlets G .G at thc'bottom of the mill are represented in g. 3. I have shown a complete' die' at only one outlet, but the other -is of the same construction in all respects. i A

4My first improvement consists in the employment of what I term a. wiper," D, attached to the drivingshaft C at or near the bottom of the pug-milhbeing situated opposite to, and of a. sufficient height to cover, the

outlets G G. This wiperY is of peculiar construction, its body or main part being of curved,veccentric form, sothat as it 'revolves it Will drive the clay forward'aud outward with great force or pressure. lits outer edge reaches nearly out to the sidesiof the pug-mi1l, and its lower edge runs close to the bottom thereof.' At the upper edgerof the main part or body is a spiral harige, d, projecting outward from the forward or convex side' of the Wipernearlyto theY sides of the pug-mill, substantially as represented, so that it will' have the action to continually gather and press `downward additional clay to`be pressed ou'tward bythe body of the"niper. No exact construction'of the Wiper is essential, .but any variation fro'm the form shovm may be employed yvhich performs the doublefunction of gathering and forcing down the' clay and driving it outward by anearly positive action. l l

My next improvement consists in the-peculiar form or constructionof thedic outlets or apertures G, as shown in iig. 3. The inner vertical edge g of each, toward which the nt'iperl) rst'advances in its revolutions, is rounded or chamfered o` substan'tial.ly,as shown, so as to oifer freeor unimped'ed passage tothe moving clay outwerdto the die, while the othcrsucceeding edge L of each is 'left abrupt, substantially as shown, in order to offer abarrier tothe further revolution of. the clay and to direct it outward. This construction of thermouth of. each outlet is ofvery greater essential importance, in connection with. airevolving Wiperf or any other revolving presser or piston, other`\visethe mass ofi-clay 'n ould be carried round in the pug-mill, and comparatively; little would b'e driven to the dies, and that 'with insirfticient pressure. 'It will be seen that the Wiper rst'acts., to drive the clay-to one die and then to the other, s o as toproduce the alternate motion and rest of the forming web, as above described. Soonafter it lpasses one outlet, as indicated by black lines in g; 3, `it beginsto opera ate against the other outlet, and continues'to press thereinuntil it passes by it, or to the position shown by red lines in the same figure. I employ rollers m mmnd'vt'n at the mouth of eachI die, one for each side or face of the web,r to diminish friction, and form and deliver thetveb with smooth and compact surfaces. The upper and lowerdies m m are mounted in. bearing-blocks L L, which are ,secured to `the mouth I of thcdie, und4 have a vertical sliding movement on ways ll, iig. 1 and they are held' in position by set-screwspp -or their equivalents, so that the rollers may be yadjlvlsted upor down to any position required. The side rollers n n are mounted in bearing-blocks M M, which slide transversely in ways or recesses in the bearing-blocks L L of the rollers in m, as most clearly shown in fig. '6. These bearing-blocks lli' M- are adjusted out or in by setscrews s s, turning in theblocks L L, substantially as shown in the' drawings.. 'lhus the side rollers are adjustable out or in .at pleasure, either both ends alike or independently and differently.

An important improvement of mine in these rollers is making the side dies n n somewhat conical, or of greater diameter at the bottom than at the top, as seenv in iig. 2, s o that the mouth of the die is narrowed a little at the bottom. The object of'this' is to compensate for thewideuing of the web by its plasticity as it issues from the dies` the bottom having all the weight of the clay above, being pressed outward and widenedvsomewhat, which-requires tobe obviated.A These rollers are made suiiciently conical to alloiv for the ordinary widening, as ascertained by observation,'while the'separate adjustment out and in of the ends ofthe rollers enables them to be set exactly as required to 'produce a square web. The whole purpose might be accomplished by mere l adjustment, but not sc perfectly as by the tapering form of the rollers, 4since the'endsand journals of the rollers wouldnot fit well and freely in their positions by so doing. l

The die shown is of the form to make plain bricks. In making tiles, o r'bricks of ornamental orirregular form, the shape and position ofthe rollers should be such ns to produce the forms-required. It will be seen that the side rollers nn'are adjustable ont and in between the top 'and bottom rollers m m, their ends fitting squarely and being in close proximity thereto, so that clean', sharp, and perfect corners are formed ou the web, however much the side rollers may be adjusted. The top and bottom rollers, aftenbeing set to the proper thickness of the web, need little or nofurther adjustment. The rollers m m and n n are covered with cloth, such as canton flannel, to prevent the clays adhering there-to.l I have an improved method or means of securing the cloth around the rollers, as shown. vA longitudinal groove, r, is 4formed 'in the periphery of each roller,into which the edges ofthe cloth are brought, andfastened by a strip of woodroriequivalent driven into, and so as to fill, the groove. A similar but annular gloove, t, iig. 5, is formed in each end of the'rollers,linto which the ends of the cloth are inserted, and heldby an annular strip of wood.

What I claim as my invention, and desire to secure by Letters Patent, is

The lwiper D, with its flange d, constructed and operating substantially as and for the purpose herein specified. l. Y

I also claim the construction o f the outlets G G, with the rounded or chamfered corners gg, and abrupt corners h h, substantially-as and for the purpose-herein set forth. l

I also 'claim the conical or tapering die rollersn n, for the purpose herein set forth. v

I also claim the arrangement ofthe rollers 'n n, so as to be adjustable out and in between the rollers m m, substantially as and for the purpose herein specified. v

I also claim the device for fastening the cloth covering around the die rollers, consisting of the longitudinal and annular grooves r t t, 'andfastening strips of wood or equivalent, substantially as set forth.

W. e. HYNDMAN.'

Witnesses:

J. S. BRowN, Tues. T. PARKER. 

